Can Lymph Nodes Swell for No Reason?

Usually, swollen lymph nodes aren't a reason to worry. They're simply a sign that your immune system is fighting an infection or illness. But if they're enlarged with no obvious cause, see your doctor to rule out something more serious.

Can lymph nodes swell randomly?

Swollen lymph nodes that appear suddenly and are painful are usually due to injury or infection. Slow, painless swelling may be due to cancer or a tumor.

Can lymph nodes swell without cancer?

Why Lymph Nodes Swell

Swollen lymph nodes are a sign that they're working hard. More immune cells may be going there, and more waste could be building up. Swelling usually signals an infection of some kind, but it could also be from a condition like rheumatoid arthritis or lupus, or rarely, cancer.